<template>
  <!-- 底部部分 -->
  <footer class="footer">
    <span class="todo-count"
      >剩余<strong>{{ count }}</strong></span
    >
    <ul class="filters" @click="$emit('lighted', type)">
      <li>
        <a
          @click.prevent="type = 'all'"
          :class="{ selected: type === 'all' }"
          href="#/"
          >全部</a
        >
      </li>
      <li>
        <a
          @click.prevent="type = 'active'"
          :class="{ selected: type === 'active' }"
          href="#/active"
          >进行中</a
        >
      </li>
      <li>
        <a
          @click.prevent="type = 'completed'"
          :class="{ selected: type === 'completed' }"
          href="#/completed"
          >已完成</a
        >
      </li>
    </ul>
    <button @click="clear" v-show="isShow" class="clear-completed">
      清除已完成
    </button>
  </footer>
</template>

<script>
export default {
  name: "TodoFooter",
  props: {
    list: {
      type: Array,
      required: true,
    },
  },
  data() {
    return {
      type: "",
    };
  },
  methods: {
    clear() {
      this.$emit("clearTask");
    },
  },
  computed: {
    count() {
      return this.list.length;
    },
    isShow() {
      return this.list.some((item) => item.isDone);
    },
  },
};
</script>

<style scoped>
</style>